org.jboss.seam.security.crypto
Class BinTools

java.lang.Object
  org.jboss.seam.security.crypto.BinTools

public class BinTools
extends Object

Copied from Matthias Gartner's PKCS#5 implementation - see http://rtner.de/software/PBKDF2.html

Free auxiliary functions. Copyright (c) 2007 Matthias Gärtner

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

For Details, see http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

Version:

1.0

Author:

Matthias Gärtner

Field Summary

static String

hex

Constructor Summary

BinTools()

Method Summary

static String	bin2hex(byte[] b) Simple binary-to-hexadecimal conversion.
static int	hex2bin(char c) Convert hex digit to numerical value.
static byte[]	hex2bin(String s) Convert hex string to array of bytes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

hex

public static final String hex

See Also:

Constant Field Values

Constructor Detail

BinTools

public BinTools()

Method Detail

bin2hex

public static String bin2hex(byte[] b)

Simple binary-to-hexadecimal conversion.

Parameters:

b - Input bytes. May be null.

Returns:

Hexadecimal representation of b. Uppercase A-F, two characters per byte. Empty string on null input.

hex2bin

public static byte[] hex2bin(String s)

Convert hex string to array of bytes.

Parameters:

s - String containing hexadecimal digits. May be null. On odd length leading zero will be assumed.

Returns:

Array on bytes, non-null.

Throws:

IllegalArgumentException - when string contains non-hex character

hex2bin

public static int hex2bin(char c)

Convert hex digit to numerical value.

Parameters:

c - 0-9, a-f, A-F allowd.

Returns:

0-15

Throws:

IllegalArgumentException - on non-hex character